Portable veneer-trimmer.



C. L. MATTISON. PORTABLE VENEER TRIMMER. APPUCATION FILED NOV. 2. 1914.

Patented Feb. 20, 1917.

2 SHEETSSHEET l IiZV6/Z'ef07'.

2 SHEETS C. L. MATTISON. PORTABLE VENEER TRIMMER. ,APPLICATION FILED NOV2. 1914.

' draw-knife.

outrun srarrias rnrnr CARL LAWRENUE MAEETISUN, F BELOIl, WISCONSIN,ASSIGNOR T0 0. MATTISQH MACHINE WORKS, Q]? BELOIT, WISCONSIN, ACORPORATION QF WISCONSIN.

PGBTABLE VENEER-TRIMMER.

terns-ire.

Specification of Letters Eatent.

Application filed November 2, 1914. Serial No. 869,743.

Yb all whom it may concern:

llc it known that l, CARL LAWRENCE MAT- rison, a citizen. of the UnitedStates, residing at Beloit, inthe county of Rock and State of Wisconsin,have invented certain new and useful improvements in PortableVeneer-Trimmers, of which the following is a specification.

In the manufacture of desks, tables and other articles of furniture, itis common to secure a strip of veneer to the vertical edge of the toppiece so present a more pleasing grain of the wood. The strip of veneerused for this purpose is wider than the thickness of the top piece so.that the upper edge of the veneer projects above the upper face of thetop and must be removed after the glue has set. Heretotore thisprojecting upper edge has been removed in various ways by hand, probablythe most common way being to cut oil the edge with a Obviously thisoperation is a tedious and slow one and furthermore great care must betaken to prevent splitting of the grain of the veneer down below theface of the table during the cutting operation.

The object of my invention is to produce a simple and eilective machinetool for trimming off this veneer edge quickly and evenly "and withoutany liability of splitting the veneer.

The invention also refers to certain details of construction which willbe fully described hereinafter.

in the acconu ianying drawings, Figure 1 is a perspective viewillustrating in use a veneer trimmer embodying the features of myinvention, the wires for supplying electric power to the motor beingomitted. Fig. 2 a top plan view of the machine. Fig. 3 is a horizontalsection through the lower portion of the machine, substantially in theplane of line 3-3 of Fig. 5. Fig. 4 is a side elevation, and 5 is anenlarged vertical central section through the machine.

In the preferred embodiment illustrated in the drawings, the machinecomprises housing consisting of a lower or base section constituting asupport or gage, and

anupper section 11, the latter constituting the casing of an electricmotor, and being threaded into the base section 10.

The motor casing 11 may consist of two sections suitably securedtogether. by bolts 12. The armature shalt is indicated at 13,

'ing.

the armature, commutator and brushes being indicated in dotted lines bynumerals 14, 15 and. 16, respectively. These motor parts may be of anycommon or preferred construction, and for-the sake of clearness thefield has been entirely omitted from the drawings.

The shaftl3 is supported in ball bearings which, in the preferred formherein shown, comprise inn'er and outer rings 17 and 18 between whichare anti-friction balls 19. The inner, rings are fixed upon the shaft13, while the outer rings are fixedly seated in hollow bosses 20 and 21on the upper and lower ends of the casing 11. On the upper end of theshaft 13 is fixed a washer 22 and nut 23 abutting against the upper ballbear- T he open end of the upper boss 20 is closed by a suitable plug24- to exclude dust and other foreign matter.

Upon the lower end of the armature shaft 13 beneath the lower ballbearing, is rigidly fixed a head 25, and to theunderside of this head issecured a circular saw 26. Preferably, the saw'is secured tothe head bya suitable np mber of countersunk screws 27, so that the saw may beeasily removed for sharpening when desired. The upper end of the head25shuts against the lower ball bearing, so that saidhead and the nut andwasher 22 23 effectively preveht endwise movement of the armature shaft,the saw thus being held against vibration.

The machine is arranged to be carried from place to place by a suitablehandle 28 which is secured in this instance to the base section 10. Aset screw 29 (Fig. 2) threaded in the base section is arranged to lockthe sections 10 and 11 against relativerotetion when tightened up.Preferably, a block of fiber or other suitable material (not shown) isplaced at the inner end of the set screw to bear against the thread onthe casing 11, so as to prevent injury to the latter.

The screwthread connection between the base section 10 and the'motorcasing 11 is provided for the purpose oi? obtaining an ad justmentbetween the lower edge of the base and the face of the saw. Suchadjustment may be necessary either in original assembly or when the sawis replaced after sharpening or for other purposes. To make theadjustment the set screw 29 is loosened, the sections 10 and 11 aregiven a relatively rotary movement to the desired extent, and

IN a

the set screw is again tightened to lock the sections together.

The base 10 is reduced in size at the-lefthand side of the handle 2-8,as seen most tearly in Fig. 3, being of less diameter at this place sothat the edge of the saw 26 projects beyond the base, the latter havingits lower edge cut away for this purpose. The base fits relatively closeto the edge of the saw, and also close to the upper face thereof, so asto prevent splinters or the like from being carried into the interior ofthe casing by the saw. The wall of this recess or reduced portion may beheld in contact with the veneer edge so that, if desired, the veneeredgelmay serve as a guide for the machine in moving along the work. SeeFig. 3.

In use, the machine is placed upon the upper face of the table top A-lorother article of furniture, the Weight of tlie machine resting upon thelower edge of the base 10. This lower edge provides a largebearingsurface for the machine, which extends continuously around the largerportion of the base, so that a steady rest for; the machine will besupplied, even if the piece of work on which the machine resting be anarrow or irregnlar strip or the like, instead of a broad tab top. Themachine is moved to carry the projecting edge of the saw against theveneer B and is pushed along the table entirely around the perimeterthereof. At the corners of the table the sawed off veneer edge will bowoutwardly sufliciently to permit the machine to be ,-mo\ ed up into thecorner so that the veneer at the corners may be trimmed as effectivelyas at the sides of the table.

It will be seen that this machine is very effective for veneer trimming,since it does its work quickly, accurately and evenly and has notendency to splitthe veneer. Furthermore, since it is the machine on thetable and push it along, 'tl'ieoperation does not require an experiencedworkman, but may be performed by cheap labor.' M

While I have herein shown the preferred embodiment-of my invention, Irecognize that variousImodifications may be resorted to withoutdeparting from the spirit and scope thereof, and. I therefore do notlimit myself to the details of construction shown in the drawings,except as defined by the terms of the appended claims.

I claim as my invention:

1. A portable veneer trimming tool comprising a support or gage :ulaptedto rest against the face of the work to stabilize the tool, asaw-carried by said support in position to lie approximainly parallelwith and very close to the said [ace of the work when.

the face of only necessary to set' emme the support or gage is inengagement therewith, and means for driving said saw.

2. A device of the character described comprislng a lower or basesection constituting a support or gage, an upper section adustablymounted on the lower section and constituting the casing of a motor, themotor having a drive shaft, and a c rcular saw closed by said base andoperatively con- 3'0 neat d. to said motor, the saw occupyin a podi ionparallel with and close to the said face of,the article of furniturewhen said base is in engagement therewith.

4. A device of the character described comprising a motor, a hollow basethreaded upon said motor and having a cutaway portion, and a rotarycircular saw operatively connected to the motor and inclosed by saidbase and adapted to project through said cut away portion, the sawoccupying a plane parallel with and close to the face of an object withwhich said base is in'engagement.

5. A device of the character described comprising a hollow base havingan'arcu 06 ate lower edge adapted to rest upon the work and havinga cutaway portion, a motor comprising a casing threaded into said baseandcomprising a shaft, and a rotary circular saw rigidly fixed on thelower end of said shaft and projecting through the cut away portion ofsaid base, said saw lying in approximately the same plane as the saidarcuate lower edge of the base.

ing edge of veneer, a hollow base having-a lower edge arranged to bear.a ainst the worlgdriving means on the base, and a rotary circularcutting element within the base operatively connected to and lying in aplane close to said lower edge of the base, the latter having reducedportion at one side thereof and having' its lower edge below saidreduced portion ,cut

6. In a tool" for trimming off tlir projcc'b away to expose an arc ofthe cutting element, the edge of the cut-awav portion lying close to theperiphery and the upper face of the cutting element.

in testimony whereof, l. hereunto set my hand in the pres'ecnce of twowitnesses.

CARL LAWRENCE MiAflllllrlUN. ln theprcsonco of-- i J. W. Downtmo, l M,.llusn.

base having an 75 said driving means 1 0

